I recently installed the Sharpshooters Extreme Graphics Vision ENB mod which slowed down things way too much. I'd like to increase Skyrim's performance while still being able to continue using this mod and maintain my graphics levels as they are.

My computer currently has an nVidia graphics card and 6 GB of RAM.

Is there a way to boost Skyrim's performance without sacrificing the graphical fidelity the Sharpshooters mods provides, either through changing settings or the use of alternative mods that provide the same thing, only more efficiently?

UPDATE: ok, so i removed skyrim for now (because i have a whole passle of work to do, and killing the brothers of faeldon isn't one of them) but i also stumbled across the skyrim hialgo performance mod, which might be cool too?

This question needs a bit more focus as it is a bit disjointed. You're asking how to improve your Skyrim PC's(specs we know nothing about) performance by using intense graphical mods. Briefly looking at the MOD, it seems like there are numerous graphical features such as Ambient Occlusion and Depth of Field that can be turned off to improve performance.
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tiddyMay 30 '12 at 19:55

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It seems that the Sharpshooter MODS graphical overhead when running with all settings on is way too high for your PC/Graphics Card. No performance enhancing mods will be able to support this.
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tiddyMay 30 '12 at 20:04

Why does it matter ... think of the difference between a gt210 and gt560ti for example
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AlokJun 1 '12 at 21:29

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The specific card is important, it is equals to saying "my car is european, why won't it drive fast?" No-one would be able to tell if you own a Lada or a Ferrari based from that... and that is the important part. Your card would be closer to the lada then to the ferrari in this case.
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ArperumApr 15 '13 at 9:38

3 Answers
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Have you tired from CTDs when your game is heavily modded? Unable to install HD texture packs without CTDs or travel in the world very fast? This patch fixes the problem and also brings you higher performance even without memory fixes enabled.
THIS IS NOT A GRAPHIC MODIFICATION, so feel free to use with vanilla game.
THIS WILL NOT DEGRADE QUALITY IN ANY WAY TO INCREASE PERFORMANCE.

[uses] a feature called Occlusion Culling, where [it] manually puts occlusion planes in some spots of the interiors to improve performance.
What these occlusion planes do is unrender parts of the cell/objects/NPCs that are not being seen by the player, in most cases behind a wall or above/below floors (occluded).

If less things are being draw on-screen at the same time, it means your hardware is using less processing power to achieve the same thing, and it automatically converts in better performance.

These mods will increase performance, depending on a computer's specs, but will degrade graphics:

If your computer spec lurks somewhere near or below the edge of the recommended minimum system requirements you have probably noticed that the option to disable shadows is not offered in the launcher, and consequently may have noticed that the low quality shadow settings look like garbage. If you scratched a little deeper you probably tried disabling shadows by changing the commonly recommended ini values and were disappointed to find everything had turned dark and colorless. The vanilla shadow options amount to menu choices between a garbled blocky flickering striped mess and a beautiful slide show, or editing the ini to induce a global dungeon vibe. This mod offers a alternative that I think strikes a nice balance between eye candy and system performance by removing most of the system-hog shadows. Everything will still be shaded to create the static, nice-looking shadows and colorful lights that utilize relatively little system resources. The shadows that are removed by this are the dynamically-rendered flickering shadows, commonly found near flames.

This is a cut down version of Bethesda HD texture pack for Skyrim.
It aims at improving Skyrim visuals while, at the same time, allowing
PC users with old systems to benefit from higher resolution textures.

HiAlgoBoost dynamically modifies internal rendering resolution in order to increase frame rate, and utilizes various additional approaches to make the game more responsive and smoothly controllable. It does not affect game contents.

The short answer is "you can't". That mod introduces additional work for the GPU, and it's just not able to keep up. Most performance-enhancing mods target the CPU, and wouldn't help you with your GPU bottleneck.

You probably could reach a happy medium where the perceived quality of the resulting picture would be better with Sharpshooter and lower core graphics settings than without Sharpshooter, but that's something you're going to have to do on your own, as we know next to nothing about your computer and have no way of testing.

You might be able to find some good downscales of the high-res textures they released as DLC (assuming you are using that DLC) to lighten the GPU's burden somewhat without compromising too much video quality.

You mentioned HiAlgoBoost, and I can heartily recommend it. It's a clever mod that I'm using even though I have a decent computer. It reclaims processing power from the GPU by degrading the visuals exactly when you can't tell – when the view is moving. It manages this by forcing the GPU to render as if the screen is half to a third the resolution, which gives a proportional boost in FPS, then scaling the output to fit your real resolution. While you're standing still you get full resolution, but when you move yourself or the view it instantly gives you more FPS to reduce or eliminate stutter. The FAQ section on how it works is good and informative.

I'm using it right now just because vanilla Skyrim visuals are enough to cause the slightest stutter that gets on my nerves. With HiAlgo running I can swing the view on the dizziest of circles and it's smooth as glass.

I'm not running ENB, but do read the readme – it has special instructions for how to install it so that both ENB and HiAlgo get injected together.

My only complaint with HiAlgo is that it doesn't handle ambient occlusion well. I get ambient shadows that flicker when I start and stop moving – probably something to do with AO not scaling with the changes in resolution. I'm probably going to turn off AO since it's the only thing that reminds me that the resolution trick is even happening. I'm forcing AO in the NVidia control panel though, so perhaps your experience might be different using ENB's AO settings.